- Steady-state photolysis of dimesitylbis(trimethylsilyl)germane
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The photolysis of dimesitylbis(trimethylsilyl)germane (3) in hexanes or THF, at low temperature, has been investigated as a potential method for the preparative-scale synthesis of tetramesityldigermene (5). A product mixture, consisting of hexamethyldisilane, mesitylene, 2-trimethylsilylmesitylene (7), a new germacyclobutene (8), and an unidentified polymer, was obtained. No evidence for the formation of tetramesityldigermene (5) was observed.
- Hurni, Krysten L.,Baines, Kim M.
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p. 668 - 674
(2008/09/19)
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- A novel type of nucleophilic substitution reactions on nonactivated aromatic compounds and benzene itself with trimethylsiliconide anions.
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[reaction: see text]. The reaction of fluorobenzene with Me3Si- anion (1) in HMPA at room temperature surprisingly affords o- and p-fluorotrimethylsilylbenzenes (substitution of aromatic H for TMS, 76% yield) 7a and 7b and also 14% of trimethylsilylbenzene (2). Benzene itself reacts at 50 degrees C to furnish 4 in 45% yield. Pyridine affords p-trimethylsilylpyridine quantitatively. Mechanistic studies are presented.
- Postigo,Rossi
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p. 1197 - 1200
(2007/10/03)
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- Stable 2-Vinylsiliranes
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Seven 2-vinyl-1,1-dimesitylsiliranes, stable at room temperature over months, have been synthesized from the addition of dimesitylsilylene to 2,3-dimethylbutadiene, 2-methylbutadiene, trans,trans-2,4-hexadiene, cis,cis-2,4-hexadiene, and cis,trans-2,4-hex
- Zhang,Conlin
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p. 4272 - 4278
(2007/10/02)
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- Addition of Dimesitylsilylene to Olefins. A Reinvestigation
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We have reinvestigated the report that dimesitylsilylene adds nonstereospecifically to cis- and trans-2-butene. Stereospecific addition of dimesitylsilylene to cis- and trans-2-pentenes and -4-octenes produced the corresponding siliranes. A photoisomerization pathway is also reported for these siliranes. A probable explanation for the earlier and spurious interpretation is given.
- Zhang,Wagenseller,Conlin, Amcnd R. T.
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p. 4278 - 4281
(2007/10/02)
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